U.S. patent number 10,527,339 [Application Number 15/610,716] was granted by the patent office on 2020-01-07 for refrigerator appliance.
This patent grant is currently assigned to Haier US Appliance Solutions, Inc.. The grantee listed for this patent is Haier US Appliance Solutions, Inc.. Invention is credited to Stephen Bernard Froelicher, Matthew Hunter, Stephanos Kyriacou.
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United States Patent |
10,527,339 |
Hunter , et al. |
January 7, 2020 |
Refrigerator appliance
Abstract
A refrigerator appliance is provided herein. The refrigerator
appliance may include a cabinet, a door, a secondary liner, and a
heat exchange case. The cabinet may include an internal liner
defining a freezer chamber and a fresh food chamber. The door may
be attached to the cabinet. The secondary liner may be attached to
the cabinet and define a sub-compartment in fluid isolation from
the freezer chamber and the fresh food chamber. The heat exchange
case may be attached to the internal liner at the freezer chamber
in conductive thermal communication therewith. The heat exchange
case may at least partially define a convection compartment along a
portion of the internal liner. The convection compartment may be
defined in fluid isolation from the freezer and in fluid
communication with the sub-compartment.
Inventors: |
Hunter; Matthew (Louisville,
KY), Kyriacou; Stephanos (Louisville, KY), Froelicher;
Stephen Bernard (Shepherdsville, KY) |
Applicant: |
Name |
City |
State |
Country |
Type |
Haier US Appliance Solutions, Inc. |
Wilmington |
DE |
US |
|
|
Assignee: |
Haier US Appliance Solutions,
Inc. (Wilmington, DE)
|
Family
ID: |
64459285 |
Appl.
No.: |
15/610,716 |
Filed: |
June 1, 2017 |
Prior Publication Data
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|
|
Document
Identifier |
Publication Date |
|
US 20180347888 A1 |
Dec 6, 2018 |
|
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
F25D
17/065 (20130101); F25D 2317/062 (20130101); F25D
2317/065 (20130101); F25D 2317/0671 (20130101); F25D
2317/066 (20130101) |
Current International
Class: |
F25D
17/06 (20060101) |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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102679664 |
|
Sep 2012 |
|
CN |
|
102706067 |
|
Oct 2012 |
|
CN |
|
Primary Examiner: Atkisson; Jianying C
Assistant Examiner: Class-Quinones; Jose O
Attorney, Agent or Firm: Dority & Manning, P.A.
Claims
What is claimed is:
1. A refrigerator appliance comprising: a cabinet comprising an
internal liner defining a freezer chamber and a fresh food chamber;
a door attached to the cabinet to selectively restrict access to
the fresh food chamber or the freezer chamber in a closed position;
a secondary liner attached to the cabinet, the secondary liner
defining a sub-compartment in fluid isolation from the freezer
chamber and the fresh food chamber in the closed position; a heat
exchange case attached to the internal liner in conductive thermal
communication with the internal liner, the heat exchange case at
least partially defining a convection compartment along a portion
of the internal liner to direct heat to the freezer chamber, the
convection compartment being defined in fluid isolation from the
freezer chamber and in fluid communication with the sub-compartment
in the closed position, the convection compartment comprising a
non-linear airflow path extending from a return outlet to a supply
inlet; a partition wall extending within the convection compartment
and defining at least a portion of the non-linear airflow path; and
an air handler mounted on the partition wall within the convection
compartment to motivate air between the sub-compartment and the
convection compartment.
2. The refrigerator appliance of claim 1, wherein the secondary
liner is positioned on the door, and wherein the sub-compartment is
defined within the door.
3. The refrigerator appliance of claim 1, wherein the heat exchange
case is positioned within the freezer chamber.
4. The refrigerator appliance of claim 1, further comprising an air
handler in fluid communication with the freezer chamber to direct a
freezer airflow toward the convection compartment.
5. The refrigerator appliance of claim 1, further comprising a
defrost heater in thermal communication with the convection
compartment.
6. The refrigerator appliance of claim 1, wherein the convection
compartment is an evaporator-free compartment.
7. A refrigerator appliance comprising: a cabinet comprising an
internal liner defining a freezer chamber and a fresh food chamber;
a fresh food door attached to the cabinet at to selectively
restrict access to the fresh food chamber in a first closed
position; a freezer door attached to the cabinet at to selectively
restrict access to the freezer chamber in a second closed position;
a secondary liner attached to the cabinet, the secondary liner
defining a sub-compartment in fluid isolation from the freezer
chamber and the fresh food chamber in the first closed position; a
heat exchange case attached to the internal liner in conductive
thermal communication with the internal liner, the heat exchange
case at least partially defining a convection compartment along a
portion of the internal liner to direct heat to the freezer
chamber, the convection compartment being defined in fluid
isolation from the freezer chamber and in fluid communication with
the sub-compartment in the first closed position, the convection
compartment comprising a non-linear airflow path extending from a
return outlet to a supply inlet; a partition wall extending within
the convection compartment and defining at least a portion of the
non-linear airflow path; and an air handler mounted on the
partition wall within the convection compartment to motivate air
between the sub-compartment and the convection compartment.
8. The refrigerator appliance of claim 7, wherein the secondary
liner is positioned on the fresh food door, and wherein the
sub-compartment is defined within the fresh food door.
9. The refrigerator appliance of claim 7, wherein the heat exchange
case is positioned within the freezer chamber.
10. The refrigerator appliance of claim 7, further comprising an
air handler in fluid communication with the freezer chamber to
direct a freezer airflow toward the convection compartment.
11. The refrigerator appliance of claim 7, further comprising a
defrost heater in thermal communication with the convection
compartment.
12. The refrigerator appliance of claim 7, wherein the convection
compartment is an evaporator-free compartment.
Description
FIELD OF THE INVENTION
The present subject matter relates generally to refrigeration
appliances, and more particularly to refrigeration appliances
including features for making ice.
BACKGROUND OF THE INVENTION
Certain appliances, such as refrigerator appliances, generally
include an icemaker. In order to produce ice, liquid water is
directed to the icemaker and frozen. After being frozen, ice may be
stored within a storage bin appliance. In order to ensure ice is
formed and/or remains in a frozen state, the icemaker and bin may
be mounted within a chilled portion of the appliance. For instance,
some conventional appliances provide an icemaker and storage bin
within a freezer compartment. Other conventional appliances provide
the icemaker and storage bin within a separate sub-compartment,
e.g., within a door. In order to maintain efficient operation of
the appliance, these conventional appliances generally provide an
air circulation system to continuously circulate air within the
sub-compartment with air within the freezer compartment.
Certain drawbacks exist with these conventional appliances. For
instance, air within the freezer may be affected by the items
stored within the freezer. Foul or unpleasant odors may be conveyed
to the icemaker and/or storage bin. Over time, the odors within the
air may taint the flavor or texture of the ice within the
appliance. Moreover, in some conventional systems (e.g., appliances
having a separate sub-compartment for the icemaker and/or storage
bin), circulating air may generate an undesirable temperature
gradient within the freezer. Specifically, relatively warm air
conveyed from a separate sub-compartment may rapidly increase a
localized temperature within the freezer compartment. In some
instances, this may lead to some items within the freezer
compartment reaching an undesirable temperature. Although separate
evaporators or cooling components may be provided to reduce the
temperature gradient (i.e., the effects of relatively warm
sub-compartment air), such components may generally increase the
complexity and overall inefficiency of the appliance. Moreover,
such components may be difficult to effectively and consistently
control.
In turn, it would be advantageous to provide a refrigerator
appliance having features for addressing one or more of the
above-described issues.
BRIEF DESCRIPTION OF THE INVENTION
Aspects and advantages of the invention will be set forth in part
in the following description, or may be obvious from the
description, or may be learned through practice of the
invention.
In one aspect of the present disclosure, a refrigerator appliance
is provided. The refrigerator appliance may include a cabinet, a
door, a secondary liner, and a heat exchange case. The cabinet may
include an internal liner defining a freezer chamber and a fresh
food chamber. The door may be attached to the cabinet to
selectively restrict access to the fresh food chamber or the
freezer chamber in a closed position. The secondary liner may be
attached to the cabinet. The secondary liner may define a
sub-compartment in fluid isolation from the freezer chamber and the
fresh food chamber in the closed position. The heat exchange case
may be attached to the internal liner at the freezer chamber in
conductive thermal communication therewith. The heat exchange case
may at least partially define a convection compartment along a
portion of the internal liner to direct heat to the freezer
chamber. The convection compartment may be defined in fluid
isolation from the freezer and in fluid communication with the
sub-compartment in the closed position.
In another aspect of the present disclosure, a refrigerator
appliance is provided. The refrigerator appliance may include a
cabinet, a fresh food door, a freezer door, a secondary liner, and
a heat exchange case. The cabinet may include an internal liner
defining a freezer chamber and a fresh food chamber. The fresh food
door may be attached to the cabinet to selectively restrict access
to the fresh food chamber in a first closed position. The freezer
door may be attached to the cabinet at the front end to selectively
restrict access to the freezer chamber in a second closed position.
The secondary liner may be attached to the cabinet. The secondary
liner may define sub-compartment in fluid isolation from the
freezer chamber and the fresh food chamber in the first closed
position. The heat exchange case may be attached to the internal
liner at the freezer chamber in conductive thermal communication
therewith. The heat exchange case may at least partially define a
convection compartment along a portion of the internal liner to
direct heat to the freezer chamber. The convection compartment may
be defined in fluid isolation from the freezer chamber and in fluid
communication with the sub-compartment in the first closed
position.
These and other features, aspects and advantages of the present
invention will become better understood with reference to the
following description and appended claims. The accompanying
drawings, which are incorporated in and constitute a part of this
specification, illustrate embodiments of the invention and,
together with the description, serve to explain the principles of
the invention.
BRIEF DESCRIPTION OF THE DRAWINGS
A full and enabling disclosure of the present invention, including
the best mode thereof, directed to one of ordinary skill in the
art, is set forth in the specification, which makes reference to
the appended figures.
FIG. 1 provides a perspective view of a refrigerator appliance
according to example embodiments of the present disclosure.
FIG. 2 provides a perspective view of the example refrigerator
appliance shown in FIG. 1, wherein a refrigerator door is in an
open position according to an example embodiments of the present
disclosure.
FIG. 3 provides a perspective view of an internal liner and air
circulation system of a refrigerator appliance according to example
embodiments of the present disclosure.
FIG. 4 provides a side view of the internal liner and air
circulation system of the example embodiments of FIG. 3.
FIG. 5 provides a magnified rear perspective view of a heat
exchange case of the example embodiments of FIG. 3.
FIG. 6 provides a schematic front view of a refrigerator appliance
according to the example embodiments of FIG. 3.
FIG. 7 provides a schematic view of a refrigerator appliance,
including a sealed cooling system, according to example embodiments
of the present disclosure.
FIG. 8 provides a schematic view of a refrigerator appliance
according to example embodiments of the present disclosure.
FIG. 9 provides a schematic view of a refrigerator appliance
according to example embodiments of the present disclosure.
FIG. 10 provides a side view of an internal liner and air
circulation system of a refrigerator appliance according to example
embodiments of the present disclosure.
FIG. 11 provides a magnified front perspective view of a portion of
the example embodiments of FIG. 10.
FIG. 12 provides a magnified front perspective view of a portion of
the example embodiments of FIG. 11, wherein an evaporator cover has
been removed for illustration of further features of the
refrigerator appliance.
FIG. 13 provides a schematic side view of a refrigerator appliance
according to example embodiments of the present disclosure.
FIG. 14 provides a schematic front view of a refrigerator appliance
according to example embodiments of the present disclosure.
FIG. 15 provides a schematic side view of a refrigerator appliance
according to example embodiments of the present disclosure.
FIG. 16 provides a schematic side view of a refrigerator appliance
according to example embodiments of the present disclosure.
FIG. 17 provides a flow chart illustrating a method of operating a
refrigerator appliance in accordance with example embodiments of
the present disclosure.
DETAILED DESCRIPTION
Reference now will be made in detail to embodiments of the
invention, one or more examples of which are illustrated in the
drawings. Each example is provided by way of explanation of the
invention, not limitation of the invention. In fact, it will be
apparent to those skilled in the art that various modifications and
variations can be made in the present invention without departing
from the scope or spirit of the invention. For instance, features
illustrated or described as part of one embodiment can be used with
another embodiment to yield a still further embodiment. Thus, it is
intended that the present invention covers such modifications and
variations as come within the scope of the appended claims and
their equivalents.
Generally, a refrigerator appliance may be provided in some aspects
of the present disclosure. The refrigerator appliance can include
multiple separate chambers, such as a fresh food chamber and a
freezer chamber. An icebox compartment for an icemaker can also be
included. For instance, an icebox compartment can be defined in a
door that permits access to the fresh food chamber. A separate
convection compartment can also be included to exchange chilled air
with the icebox compartment. The convection compartment can be
formed along a wall of freezer chamber, while still being sealed
off from the rest of the freezer chamber. During use, air can be
circulated between the convection compartment and the icebox
compartment.
Turning to the figures, FIGS. 1 and 2 illustrate perspective views
of an example appliance (e.g., a refrigerator appliance 100) that
includes an ice making feature. Refrigerator appliance 100 includes
a housing or cabinet 102 having an outer liner 118. As shown,
cabinet generally extends between a top 104 and a bottom 106 along
a vertical direction V, between a first side 108 and a second side
110 along a lateral direction L, and between a front side 112 and a
rear side 114 along a transverse direction T. Each of the vertical
direction V, lateral direction L, and transverse direction T are
mutually perpendicular to one another and form an orthogonal
direction system.
As shown, cabinet 102 generally defines chilled chambers for
receipt of food items for storage. In particular, cabinet 102
defines fresh food chamber 122 proximal to adjacent top 104 of
cabinet 102 and a freezer chamber 124 arranged proximal to 106 of
cabinet 102. As such, refrigerator appliance 100 is generally
referred to as a bottom mount refrigerator. It is recognized,
however, that the benefits of the present disclosure apply to other
types and styles of refrigerator appliances such as, e.g., a top
mount refrigerator appliance or a side-by-side style refrigerator
appliance. Consequently, the description set forth herein is for
illustrative purposes only and is not intended to be limiting in
any aspect to any particular refrigerator chamber
configuration.
According to the illustrated embodiment, various storage components
are mounted within fresh food chamber 122 to facilitate storage of
food items therein as will be understood by those skilled in the
art. In particular, the storage components include bins 170,
drawers 172, and shelves 174 that are mounted within fresh food
chamber 122. Bins 170, drawers 172, and shelves 174 are positioned
to receive of food items (e.g., beverages and/or solid food items)
and may assist with organizing such food items. As an example,
drawers 172 can receive fresh food items (e.g., vegetables, fruits,
and/or cheeses) and increase the useful life of such fresh food
items. In some embodiments, a lateral mullion 116 is positioned
within cabinet 102 and separating freezer chamber 124 and the fresh
food chamber 122 along a vertical direction V.
Refrigerator doors 128 are rotatably hinged to an edge of cabinet
102 for selectively accessing fresh food chamber 122 and extending
across at least a portion of fresh food chamber 122. In addition, a
freezer door 130 is arranged below refrigerator doors 128 for
selectively accessing freezer chamber 124 and extending across at
least a portion of freezer chamber 124. Freezer door 130 is coupled
to a freezer drawer (not shown) slidably mounted within freezer
chamber 124. Refrigerator doors 128 and freezer door 130 are each
shown in the closed position in FIG. 1 (i.e., a first closed
position corresponding to doors 128, and a second closed position
corresponding to door 130).
Refrigerator appliance 100 also includes a delivery assembly 140
for delivering or dispensing liquid water and/or ice. Delivery
assembly 140 includes a dispenser 142 positioned on or mounted to
an exterior portion of refrigerator appliance 100, e.g., on one of
refrigerator doors 128. Dispenser 142 includes a discharging outlet
144 for accessing ice and liquid water. An actuating mechanism 146,
shown as a paddle, is mounted below discharging outlet 144 for
operating dispenser 142. In alternative example embodiments, any
suitable actuating mechanism may be used to operate dispenser 142.
For example, dispenser 142 can include a sensor (such as an
ultrasonic sensor) or a button rather than the paddle. A user
interface panel 148 is provided for directing (e.g., selecting) the
mode of operation. For example, user interface panel 148 includes a
plurality of user inputs (not labeled), such as a water dispensing
button and an ice-dispensing button, for selecting a desired mode
of operation such as crushed or non-crushed ice.
Discharging outlet 144 and actuating mechanism 146 are an external
part of dispenser 142 and are mounted in a dispenser recess 150.
Dispenser recess 150 is positioned at a predetermined elevation
convenient for a user to access ice or water and enabling the user
to access ice without the need to bend-over and without the need to
open refrigerator doors 128. In example embodiments, dispenser
recess 150 is positioned at a level that approximates the chest
level of a user. During certain operations, the dispensing assembly
140 may receive ice from an icemaker 152 mounted in a
sub-compartment of the fresh food chamber 122, as described
below.
Operation of the refrigerator appliance 100 can be generally
controlled or regulated by a controller 190. In some embodiments,
controller 190 is operably coupled to user interface panel 148
and/or various other components, as will be described below. User
interface panel 148 provides selections for user manipulation of
the operation of refrigerator appliance 100. As an example, user
interface panel 148 may provide for selections between whole or
crushed ice, chilled water, and/or specific modes of operation. In
response to one or more input signals (e.g., from user manipulation
of user interface panel 148 and/or one or more sensor signals),
controller 190 may operate various components of the refrigerator
appliance 100 according to the current mode of operation.
Controller 190 may include a memory and one or more
microprocessors, CPUs or the like, such as general or special
purpose microprocessors operable to execute programming
instructions or micro-control code associated with operation of
refrigerator appliance 100. The memory may represent random access
memory such as DRAM, or read only memory such as ROM or FLASH. In
some embodiments, the processor executes programming instructions
stored in memory. For certain embodiments, the instructions include
a software package configured to operate appliance 100 and, e.g.,
execute an operation routine including the example method 600
described below with reference to FIG. 17. The memory may be a
separate component from the processor or may be included onboard
within the processor. Alternatively, controller 190 may be
constructed without using a microprocessor, e.g., using a
combination of discrete analog and/or digital logic circuitry (such
as switches, amplifiers, integrators, comparators, flip-flops, AND
gates, and the like) to perform control functionality instead of
relying upon software.
Controller 190, or portions thereof, may be positioned in a variety
of locations throughout refrigerator appliance 100. In example
embodiments, controller 190 is located within the user interface
panel 148. In other embodiments, the controller 190 may be
positioned at any suitable location within refrigerator appliance
100, such as for example within the fresh food chamber 122, a
freezer door 130, etc. Input/output ("I/O") signals may be routed
between controller 190 and various operational components of
refrigerator appliance 100. For example, user interface panel 148
may be operably coupled to controller 190 via one or more signal
lines or shared communication busses.
As illustrated, controller 190 may be operably coupled to the
various components of dispensing assembly 140 and may control
operation of the various components, such as a defrost heater 270
(FIG. 6). For example, the various valves, switches, etc. may be
actuatable based on commands from the controller 190. As discussed,
interface panel 148 may additionally be operably coupled to the
controller 190. Thus, the various operations may occur based on
user input or automatically through controller 190 instruction.
FIG. 2 provides a perspective view of refrigerator appliance 100
shown with refrigerator doors 128 in the open position. As shown,
an icebox liner 132 defining a sub-compartment (e.g., icebox
compartment 160) is attached to cabinet 102. For instance, in some
embodiments, at least one door 128 includes icebox liner 132
positioned thereon. In turn, icebox compartment 160 is defined
within one of doors 128. In some such embodiments, icebox
compartment 160 extends into fresh food chamber 122 when
refrigerator door 128 is in the closed position. Although icebox
compartment 160 is shown in door 128, additional or alternative
embodiments may include an icebox compartment defined at another
portion of refrigerator appliance 100 (e.g., within door 130 or
fresh food chamber 122). An ice making assembly or icemaker 152 may
be positioned or mounted within icebox compartment 160. Ice may be
supplied to dispenser recess 150 (FIG. 1) from the icemaker 152 in
icebox compartment 160 on a back side of refrigerator door 128.
An access door--e.g., icebox door 162--may be hinged to icebox
compartment 160 to selectively cover or permit access to opening of
icebox compartment 160. When refrigerator door 128 and icebox door
162 are both closed, icebox door 162 thus seals icebox compartment
160 from fresh food chamber 122. Any manner of suitable latch 164
is provided with icebox compartment 160 to maintain icebox door 162
in a closed position. As an example, latch 164 may be actuated by a
consumer in order to open icebox door 162 for providing access into
icebox compartment 160. Icebox door 162 can also assist with
insulating icebox compartment 160, e.g., by thermally isolating or
insulating icebox compartment 160 from fresh food chamber 122.
Icebox compartment 160 may receive cooling air from a chilled air
supply duct 166 and a chilled air return duct 168 positioned on a
side portion of cabinet 102 of refrigerator appliance 100 (e.g., at
least partially enclosed between outer liner 118 and internal liner
120). In this manner, the supply duct 166 and return duct 168 may
recirculate chilled air from a suitable heat exchange case 202
through icebox compartment 160. An air handler 176 (FIG. 4), such
as a fan or blower, may be provided to motivate and recirculate
air. As an example, air handler 176 can direct chilled air from a
separate compartment through a duct to compartment 160, as will be
described below.
In some embodiments, one or more of an icemaker 152 and ice bucket
or storage bin 154 are provided within icebox compartment 160.
Icemaker 152 may be any suitable assembly for generating ice from
liquid water, such as a rigid cube, soft-ice, or nugget ice making
assembly. Ice storage bin 154 may be positioned to receive and/or
store ice from icemaker 152. Optionally, ice storage bin 154 is
positioned below icemaker 152 and receives therefrom. For instance,
an ice chute (not pictured) may be positioned adjacent to icemaker
152 to direct ice from icemaker 152 to ice bin 154. From ice
storage bin 154, the ice can enter delivery assembly 140 and be
accessed by a user.
Turning now to FIGS. 3 through 6, various views of components of
refrigerator appliance 100, including an air circulation system
200, are provided. FIGS. 3 and 4 provide a perspective and a side
view, respectively, of an internal liner 120 of refrigerator
appliance 100. FIG. 5 provides a magnified rear perspective view of
a heat exchange case 202 and a defined convection compartment 204.
FIG. 6 provides a schematic front view of refrigerator appliance
100, and further illustrates air circulation system 200.
As shown, internal liner 120 generally defines fresh food chamber
122 and/or freezer chamber 124. Specifically, an inner surface 206
of internal liner 120 may define one or both of fresh food chamber
122 and freezer chamber 124. An opposite outer surface 208 of
internal liner 120 may face away from inner surface 206 and the
respective fresh food chamber 122 or freezer chamber 124.
Internal liner 120 may be formed from a single continuous integral
component or, alternatively, from multiple connected pieces. When
assembled, fresh food chamber 122 may be fluidly isolated from
freezer chamber 124. For instance, both chamber 122, 124 may be
isolated such that no air is exchanged between chambers 122, 124
when one or both of doors 128, 130 are closed.
In the illustrated embodiments, internal liner 120 includes a
plurality of walls defining chambers 122, 124. Specifically,
internal liner 120 includes a first and a second fresh food
sidewall (210 and 212) spaced apart along the lateral direction L,
as well as an upper and a lower fresh food wall (214 and 216)
spaced apart along the vertical direction V. A rear fresh food wall
218 may join upper fresh food wall 214, lower fresh food wall 216,
and fresh food sidewalls 210, 212 to define an internal extreme of
fresh food chamber 122 along the transverse direction T (i.e., a
point or plane of fresh food chamber 122 most proximal to rear side
114 of cabinet 102). Rear fresh food wall 218 may further be
positioned opposite an opening defined between the transverse fresh
food walls 210, 212, 214, 216 and selectively covered by doors 128.
Internal liner 120 may further include a first and a second freezer
sidewall (220 and 222) spaced apart along the lateral direction L,
as well as an upper and a lower freezer wall (224 and 226) spaced
apart along the vertical direction V. A rear freezer wall 228 may
join upper freezer wall 224, lower freezer wall 226, and freezer
sidewalls 220, 222 to define an internal extreme of freezer chamber
124 along the transverse direction T (i.e., a point or plane of
freezer chamber 124 most proximal to rear side 114 of cabinet 102).
Rear freezer wall 228 may further be positioned opposite an opening
defined between the transverse freezer walls 220, 222, 224, 226 and
selectively covered by door 130.
When assembled, internal liner 120 may be assembled at least
partially within outer liner 118 (FIG. 1). Insulation (not
pictured) may be positioned between internal liner 120 and outer
liner 118 along outer surface 208. Additionally or alternatively,
insulation may be positioned along outer surface 208 between fresh
food chamber 122 and freezer chamber 124.
Turning briefly to FIG. 7, a schematic view of certain components
of a sealed cooling system 180 for refrigerator appliance 100 is
provided. As may be seen in FIG. 7, refrigerator appliance 100
includes a sealed cooling system 180 for executing a vapor
compression cycle for cooling air within refrigerator appliance
100, e.g., within fresh food chamber 122 and freezer chamber 124.
Sealed cooling system 180 includes a compressor 182, a condenser
184, an expansion device 186, and one or more evaporators 188A,
188B connected in fluid series and charged with a refrigerant. As
will be understood by those skilled in the art, sealed cooling
system 180 may include additional or fewer components. For example,
sealed cooling system 180 may include only a single evaporator
(e.g., mounted within fresh food chamber 122 or freezer chamber
124) or multiple discrete evaporators positioned separate locations
within cabinet 102.
Within sealed cooling system 180, gaseous refrigerant flows into
compressor 182, which operates to increase the pressure of the
refrigerant. This compression of the refrigerant raises its
temperature, which is lowered by passing the gaseous refrigerant
through condenser 184. Within condenser 184, heat exchange (e.g.,
with ambient air) takes place so as to cool the refrigerant and
cause the refrigerant to condense to a liquid state.
Expansion device 186 (e.g., a valve, capillary tube, or other
restriction device) receives liquid refrigerant from condenser 184.
From expansion device 186, the liquid refrigerant enters evaporator
188A and/or evaporator 188B. In some embodiments, such as the
embodiment of FIG. 7, one evaporator 188A is positioned within
freezer chamber 124 while another evaporator 188B is positioned
within fresh food chamber 122. Upon exiting expansion device 186
and entering evaporator(s) 188A, 188B, the liquid refrigerant drops
in pressure and vaporizes. Due to the pressure drop and phase
change of the refrigerant, evaporators 188A, 188B are cool relative
to freezer and fresh food chambers 124 and 122 of refrigerator
appliance 100. As such, cooled air is produced and refrigerates
freezer and fresh food chambers 124 and 122 of refrigerator
appliance 100. Thus, evaporators 188A, 188B are heat exchangers
which transfer heat from air passing over evaporators 188A, 188B to
refrigerant flowing through evaporators 188A, 188B. In some
embodiments, an air handler 189A or 189B, such as a fan or blower,
is provided adjacent to one or more of evaporators 188A, 188B. For
instance, air handler 189A may be provided within freezer chamber
124 to motivate air across evaporator 188A. Additionally or
alternatively, air handler 189B may be provided within fresh food
chamber 122 to motivate air across evaporator 188B.
Turning briefly now to FIGS. 8 and 9, schematic views of certain
embodiments of refrigerator appliance 100 are illustrated.
Optionally, as shown in FIG. 8, refrigerator appliance 100 may
provide freezer chamber 124 in fluid isolation from fresh food
chamber 122, e.g., when doors 128 and 130 are in a closed position
(FIG. 1). Alternatively, as shown in FIG. 9, refrigerator appliance
100 may provide freezer chamber 124 in fluid communication with
fresh food chamber 122, e.g., when doors 128 and 130 are in a
closed position (FIG. 1).
As may be seen in FIG. 8, internal liner 120 may define a fluidly
isolated freezer chamber 124 and fresh food chamber 122. During
operations, air handler 189A may be activated (e.g., rotated as
commanded by controller 190--FIG. 1), thereby motivating a freezer
airflow (represented by arrows 191A) within a portion of freezer
chamber 124. Specifically, the airflow 191A may flow across at
least a portion of evaporator 188A, thereby furthering convection
heat transfer within freezer chamber 124. Separately or
independently, air handler 189B may be activated (e.g., rotated as
commanded by controller 190), thereby motivating a fresh food
airflow (represented by arrows 191B) within a portion of fresh food
chamber 122. Specifically, the airflow 191B may flow across at
least a portion of evaporator 188B, thereby furthering convection
heat transfer within fresh food chamber 122. Airflows 191A, 191B
will thus recirculate apart from each other. As will be described
below, another separate airflow (represented by arrows 280) may be
selectively motivated (e.g., by air handler 176) between icebox
compartment 160 and convection compartment 204.
As may be seen in FIG. 9, internal liner 120 may define a fluidly
communicating freezer chamber 124 and fresh food chamber 122.
During operations, air handler 189A may be activated (e.g., rotated
as commanded by controller 190--FIG. 1), thereby motivating a
dual-chamber airflow (represented by arrows 192) within a portion
of freezer chamber 124. Specifically, the airflow 192 may flow
across at least a portion of evaporator 188A, thereby furthering
convection heat transfer within freezer chamber 124. Moreover, the
airflow 192 may further be directed to a portion of fresh food
chamber 122. Specifically, the airflow 192 may be selectively
permitted or restricted through a flow control device 194 (e.g.,
air damper or valve) in fluid communication between freezer chamber
124 and fresh food chamber 122. Optionally, at least a portion of
the airflow 192 may be circulated within freezer chamber 124
without passing to fresh food chamber 122. Additionally or
alternatively, flow control device 194 may be selectively opened
and closed (e.g., as commanded by controller 190) based on cooling
demands within freezer chamber 124 and fresh food chamber 122. The
airflow 192 may thus be selectively circulated from freezer chamber
124 to fresh food chamber 122 and vice versa. As will be described
below, another separate airflow (e.g., represented by arrows 280)
may be selectively motivated (e.g., by air handler 176) between
icebox compartment 160 and convection compartment 204.
Returning to FIGS. 3 through 6, a heat exchange case 202 is
provided on a portion of internal liner 120. Specifically, heat
exchange case 202 is positioned or mounted along a portion of
internal liner 120 at the freezer chamber 124. When assembled, heat
exchange case 202 at least partially defines a convection
compartment 204. As shown, the internal liner 120 (e.g., the
portion of internal liner 120 along which heat exchange case 202 is
positioned) may further define convection compartment 204. In some
such embodiments, heat exchange case 202 is positioned within or
enclosed by freezer chamber 124. In turn, a portion of inner
surface 206 defines convection compartment 204 with heat exchange
case 202.
Generally, convection compartment 204 is provided in fluid
isolation from freezer chamber 124. In other words, air is not
readily exchanged between convection compartment 204 and freezer
chamber 124 (e.g., the surrounding portion of freezer chamber 124).
For instance, heat exchange case 202 may be provided as a solid
member lacking any door or open passage in fluid communication with
freezer chamber 124 and/or fresh food chamber 122. Nonetheless,
heat exchange case 202 may be conductive thermal communication with
internal liner 120 at freezer chamber 124. Although convection
compartment 204 is illustrated as a generally open cavity in FIGS.
3 through 6, alternative embodiments may include one or more fin
members (e.g., attached to or formed on heat exchange case 202
and/or internal liner 120) extending into convection compartment
204, thereby increasing the surface area within convection
compartment 204.
During use, heat may transfer between convection compartment 204
and freezer chamber 124 during operations of appliance 100, e.g.,
through internal liner 120. Specifically, heat may be conducted
from convection compartment 204 and through internal liner 120
before being absorbed within the relatively cool environment of
freezer chamber 124. In turn, convection may further serve to draw
heat from the affected portions of internal liner 120. In some
embodiments, heat may additionally be conducted from convection
compartment 204 through heat exchange case 202 and absorbed within
freezer chamber 124. Optionally, an evaporator (e.g., evaporator
188A) may be mounted adjacent to heat exchange case 202 outside of
convection compartment 204 to further promote heat transfer from
convection compartment 204. Advantageously, the sealed convection
compartment 204 may prevent or reduce significant temperature
variations or gradients within freezer chamber 124 without
requiring additional active cooling components, such as an
evaporator, within the convection compartment 204.
In turn, convection compartment 204 may be an evaporator-free
compartment. Specifically, no evaporator (or other isolated
refrigerant-flowing component, such as a condenser) of a sealed or
unsealed refrigeration system is provided within convection
compartment 204. Icebox compartment 160 and/or air passages 242,
252 may further be evaporator-free such that the air path defined
through air circulation system 200 does not include any evaporator
or otherwise active refrigeration component. In turn, air flowed
between convection compartment 204 and icebox compartment 160 may
be recirculated without directly flowing over or across an
evaporator or other isolated refrigerant-flowing component.
Advantageously, assembly and operation of air circulation system
200 may be relatively easy, quick, and cost effective while
providing efficient and effective cooling therethrough.
In some embodiments, an air handler 176 is provided in fluid
communication between convection compartment 204 and icebox
compartment 160 to motivate air between icebox compartment 176 and
convection compartment 204. Air handler 176 may be operably coupled
(e.g., electrically coupled) to controller 190 (FIG. 1). In turn,
controller 190 may be configured to activate or otherwise operate
air handler 176 as desired. In optional embodiments, the
performance of air handler 176 (e.g., the speed of rotation or
volumetric flow rate at which air handler 176 motivates air
therethrough) is operatively linked to operation of icemaker 152.
For instance, the rate at which icemaker 152 produces ice (e.g.,
mass of ice produced per day) may correspond to performance of air
handler 176. Either component 176, 154 may be a variable component.
In some such embodiments, the ice production rate of icemaker 152
may be selectively varied according to the performance of air
handler 176. As an example, icemaker 152 may produce a relatively
high mass of ice per day when air handler 176 operates at a first
speed and another relatively low mass of ice per day when air
handler operates at a second speed that is lower than the first
speed.
Although convection compartment 204 generally provides an open void
through which air may flow, convection compartment 204 may be
defined as a non-linear airflow path. For instance, at least a
portion of the convection compartment 204 within heat exchange case
202 between return outlet 256 and supply inlet 244 may be
non-linear such that air 280 passing therethrough is redirected one
or more times. In some such embodiments, one or more air-guiding
components may be included. For instance, a partition wall 230 may
extend within convection compartment 204 at a position between the
heat exchange case 202 and the portion of the internal liner 120
defining convection compartment 204. In certain embodiments,
partition wall 230 extends downward along the vertical direction V
from a top portion of convection compartment 204. Partition wall
230 may thus separate convection compartment 204 into a forward
cavity 232 and a rearward cavity 234. A flow channel 236 may be
defined between forward cavity 232 and rearward cavity 234, e.g.,
as a vertical gap between partition wall 230 and a bottom portion
of convection compartment 204.
In additional or alternative embodiments, an air handler 176 may be
provided within convection compartment 204. For instance, air
handler 176 may be mounted on partition wall 230 and/or against a
portion of internal liner 120. Advantageously, such mounting may
advantageously absorb or reduce vibrations and noise generated by
air handler 176 during operations. Nonetheless, alternative
embodiments may include air handler at another suitable position
that is outside of the convection chamber 204, but otherwise in
fluid communication therewith.
As shown, convection compartment 204 may be generally provided in
fluid communication with icebox compartment 160. Specifically, a
separate air supply duct 166 and air return duct 168 are provided
in fluid communication between convection compartment 204 and
icebox compartment 160. Air supply duct 166 defines a supply
passage 242 that extends vertically between a supply inlet 244 and
a supply outlet 246. When assembled, the supply outlet 246 is
positioned above supply inlet 244, e.g., proximal to icebox liner
132. Air return duct 168 defines a return passage 252 that extends
vertically between a return inlet 254 and a return outlet 256. When
assembled, return inlet 254 is positioned above return outlet 256,
e.g., proximal icebox liner 132. Optionally, return inlet 254 may
be further positioned below supply outlet 246. Additionally or
alternatively, the return outlet 256 and supply inlet 244 are
defined at the convection compartment 204 forward from the rear
freezer wall 228 along the transverse direction T.
In order to exchange air with ducts 166, 168, icebox liner 132
defines an icebox inlet 248 in downstream communication with supply
outlet 246, as well as a separate icebox outlet in upstream
communication with return inlet 254. In some embodiments, one or
more gaskets 260 may be provided between icebox inlet 248 and
supply outlet 246, as well as between icebox outlet 258 and return
inlet 254. In other words, gasket(s) 260 may be provided at a
mating surface of icebox liner 132 and internal liner 120 to
sealingly engage the other. For instance, when the door 128 is in a
closed position, a gasket 260 may sealingly engage a first fresh
food sidewall 210 with icebox liner 132 to prevent air leakage. In
turn, gaskets 260 may help to prevent or minimize cold air flowing
between supply duct 166 and return duct 168 from escaping into the
fresh food chamber 122 and/or relatively warm, humid air from fresh
food chamber 122 from entering return duct 168.
During operations, and when door 128 is in the closed position, air
may be directly recirculated between icebox compartment 160 and
convection compartment 204 (as indicated by arrows 280). For
instance, air handler 176 may motivate relatively low-temperature
air from the rearward cavity 234 of convection compartment 204 into
air supply duct 166 through supply inlet 244. Air within supply
duct 166 may travel through supply passage 242 before flowing
directly from supply outlet 246 to icebox inlet 248 and into icebox
compartment 160. Within icebox compartment 160, air may then flow,
e.g., downward along the vertical direction V, across icemaker 152
and storage bin 154. Thus, air may absorb heat within icebox
compartment 160, e.g., through convection, before flowing through
icebox outlet 258 and return inlet 254 below storage bin 154. Air
may subsequently flow through return passage 252 before flowing
through convection compartment 204. Within convection compartment
204, air may flow successively through forward cavity 232 and flow
channel 236 before returning to rearward cavity 234.
Over time, or in response to extended cooling operations, frost may
form on certain portions of heat exchange case 202 and/or within
convection compartment 204. In some embodiments, a defrost heater
270 may be utilized to defrost convection compartment 204, e.g., to
melt ice that accumulates on heat exchange case 202 and/or within
convection compartment 204. Defrost heater 270 may be any suitable
heater, such as an electrical resistive heater, radiant heater,
etc. Moreover, defrost heater 270 may be positioned adjacent or in
close proximity to (e.g., below) convection compartment 204 within
or adjacent freezer chamber 124. In certain modes of operation,
defrost heater 270 may be activated periodically; that is, a period
of time t.sub.ice elapses between when defrost heater 270 is
deactivated and when defrost heater 270 is reactivated to melt a
new accumulation of ice at convection compartment 204. The period
of time t.sub.ice may be a preprogrammed period such that time
t.sub.ice is the same between each period of activation of defrost
heater 270, or the period of time may vary. Additionally or
alternatively, in certain modes of operation defrost heater 270 may
be activated based on some other condition, such as the temperature
of convection compartment 204 or any other appropriate
condition.
In some embodiments, a defrost termination thermostat 272 may be
used to monitor the temperature of convection compartment 204 such
that defrost heater 270 is deactivated when thermostat 272 measures
that the temperature of convection compartment 204 is above a set
temperature, i.e., greater than thirty-two degrees Fahrenheit
(32.degree. F.). In some embodiments, thermostat 272 may send a
signal to controller 190 (FIG. 1) or other suitable device to
deactivate defrost heater 270 when convection compartment 204 is
above the set temperature. In other embodiments, defrost
termination thermostat 272 may comprise a switch such that defrost
heater 270 is switched off when thermostat 272 measures that the
temperature of convection compartment 204 is above the set
temperature.
In certain embodiments, a drain line 274 is disposed below heat
exchange case 202. For instance, drain line 274 may be positioned
adjacent heat exchange case 202 and be configured for directing
liquid from, for example, an outer portion of heat exchange case
202. Optionally, an evaporator pan 276 may be positioned within
cabinet 102. In some such embodiments, drain line 274 extends
between and fluidly connects an outer portion of heat exchange case
202 and evaporator pan 276. In particular, drain line 274 directs
liquid runoff from heat exchange case 202 to evaporator pan 276,
e.g., during a defrost cycle of defrost heater 270. Within
evaporator pan 276, such liquid can evaporate.
As will be understood by those skilled in the art, evaporator pan
276 can also receive liquid runoff from one or more of the
evaporator(s) of refrigerator appliance 100, e.g., during another
defrost cycle of refrigerator appliance 100. However, in
alternative exemplary embodiments, evaporator pan 276 can be a
separate component such that runoff from heat exchange case 202 and
the evaporator(s) of refrigerator appliance 100 are directed to
separate pans. In additional or alternative embodiments, drain line
274 can be directed to a drain of a plumbing system (not shown),
e.g., within a residence housing refrigerator appliance 100, such
that run off is directed into the plumbing system rather than
evaporating within refrigerator appliance 100.
Turning briefly to FIGS. 10 through 12, various views of further
example embodiments of refrigerator appliance 100 including an
internal liner 120 and alternative embodiments of air circulation
system 200. Except as otherwise indicated, it is understood that
the embodiments of FIGS. 10 through 12, are substantially similar
to the embodiments described above with respect to FIGS. 1 through
9. In turn, the same numerals are generally used throughout.
Moreover, it is also understood that the embodiments of FIGS. 10
through 12 could be modified to include features of the embodiments
of FIGS. 1 through 9, and vice versa, except as otherwise
indicated.
As shown, some embodiments of internal liner 120 may hold heat
exchange case 202 at a rear portion thereof. For instance, heat
exchange case 202 may be attached to internal liner 120 adjacent to
evaporator 188A within a portion of freezer chamber 124. In
specific embodiments, heat exchange case 202 and evaporator 188A
may be housed between an evaporator cover 196 of internal liner 120
and another portion of internal liner 120 (e.g., rear wall 228).
Optionally, evaporator cover 196 may substantially enclose heat
exchange case 202 and evaporator 188A separate from the rest of
freezer chamber 124, while still permitting fluid communication
therebetween. Additionally or alternatively, a portion of
evaporator cover 196 may further define a portion of convection
compartment 204 with heat exchange case 202, while another portion
of evaporator cover 196 extends outside of convection compartment
204 (e.g., across evaporator 188A). Heat within convection
compartment 204 may thus be advantageously conducted away from heat
exchange case 202 and outside of convection compartment 204.
In some embodiments, air handler 189A is provided to circulate air
within freezer chamber 124. For instance, air handler 189A may be
mounted on evaporator cover 196 to motivate air across evaporator
188A and/or heat exchange case 202 (e.g., outside of and separate
from convection compartment 204). In certain embodiments, a
diverter plate 198 is mounted adjacent to air handler 189A to guide
airflow therefrom. Specifically, diverter plate 198 may guide
airflow in the direction of heat exchange case 202. Air handler
189A may thus operate to direct a freezer airflow toward convection
compartment 204 (e.g., without passing any air into convection
compartment). Convective heat exchange with convection compartment
204 may thus be advantageously promoted or accelerated without
exchanging any air between freezer chamber 204 and convection
compartment 204.
As shown, particularly in FIG. 12, some embodiments of convection
compartment 204 are defined as a non-linear airflow path for air
280 (e.g., between return outlet 256 and supply inlet 244). For
instance, convection compartment 204 may be defined as a serpentine
path having multiple passes wherein air 280 is redirected (e.g.,
laterally) within heat exchange case 280. Additionally or
alternatively, convection compartment 204 may generally direct air
280 vertically. In turn, return outlet 256 may be defined below
supply inlet 244 along the vertical direction V.
Advantageously, embodiments of convection compartment 204 may
promote greater heat exchange while providing a relatively low
pressure drop therethrough. In turn, airflow through air
circulation system may be efficiently motivated to effectively
cool, e.g., icebox compartment 160 (FIG. 6).
Turning now to FIGS. 13 through 16, various alternative example
embodiments of refrigerator appliance 100 may be provided. Except
as otherwise indicated, it is understood that the embodiments of
FIGS. 13 through 16 are substantially similar to the embodiments
described above with respect to FIGS. 1 through 12. In turn, the
same numerals are generally used throughout. Moreover, it is also
understood that the embodiments of FIGS. 13 through 16 could be
modified to include features of the embodiments of FIGS. 1 through
12, and vice versa, except as otherwise indicated.
As shown in the schematic view of FIG. 13, certain embodiments of
refrigerator appliance 100 include a heat exchange case 202
positioned on rear freezer wall 228 outside of freezer chamber 124.
In other words, heat exchange case 202 is mounted to a portion of
outer surface 208 of rear freezer wall 228. As shown, heat exchange
case 202 and internal liner 120 define convection compartment 204
rearward or directly behind evaporator 188A along the transverse
direction T. Supply inlet 244 is defined above return outlet 256
along the vertical direction V. One or both of chilled air ducts
166, 168 may be directed around a lateral perimeter of internal
liner 120 within outer liner 118. Supply outlet 246 and icebox
inlet 248 are defined above icebox outlet 258 and return inlet
254.
As shown in the schematic view of FIG. 14, further embodiments of
refrigerator appliance 100 include heat exchange case 202
positioned on first freezer sidewall 220 outside of the freezer
chamber 124. In other words, heat exchange case 202 is mounted to a
portion of outer surface 208 of first freezer sidewall 220. As
shown, heat exchange case 202 and internal liner 120 define
convection compartment 204 laterally spaced from evaporator 188A.
Supply inlet 244 is defined above return outlet 256 along the
vertical direction V. One or both of chilled air ducts 166, 168 may
be directed around a lateral perimeter of internal liner 120 within
outer liner 118. Supply outlet 246 and icebox inlet 248 are defined
above icebox outlet 258 and return inlet 254.
As shown in the schematic view of FIG. 15, still further
embodiments of refrigerator appliance 100 include heat exchange
case 202 positioned on first freezer sidewall 220 outside of the
freezer chamber 124. In other words, heat exchange case 202 is
mounted to a portion of outer surface 208 of first freezer sidewall
220. As shown, heat exchange case 202 and internal liner 120 define
convection compartment 204 laterally spaced from evaporator 188A.
Supply inlet 244 is defined above return outlet 256 along the
vertical direction V. Both chilled air ducts 166, 168 are directed
around internal liner 120 within outer liner 118. Moreover, both
chilled air ducts 166, 168 are directed through lateral mullion 116
and lower fresh food wall 216. Supply outlet 246 and icebox inlet
248 are defined parallel to icebox outlet 258 and return inlet 254
along the vertical direction V. An interior duct provided within
icebox compartment 160 directs air upward along a portion of
storage bin 154 and icemaker 152 from icebox inlet 248 before the
air is directed downward along another portion of portion of
icemaker 152 and storage bin 154.
As shown in the schematic view of FIG. 16, still further
embodiments of refrigerator appliance 100 include heat exchange
case 202 positioned on upper wall 224 outside of the freezer
chamber 124. In other words, heat exchange case 202 is mounted to a
portion of outer surface 208 of upper wall 224 between freezer
chamber 124 and fresh food chamber 122. Optionally, heat exchange
case 202 may be positioned within mullion 116. As shown, heat
exchange case 202 and internal liner 120 define convection
compartment 204 vertically spaced from (e.g., above) evaporator
188A. Supply inlet 244 is defined above return outlet 256 along the
vertical direction V. A partition wall 230 may extend (e.g.,
laterally) within convection compartment 204. In turn, partition
wall 230 may thus separate convection compartment 204 into a lower
cavity downstream from supply inlet 244 and an upper cavity
downstream from the lower cavity and upstream from return outlet
256. In some such embodiments, air handler 176 is mounted within
convection compartment 204 between the lower and upper cavities.
Alternatively, air handler 176 may be mounted within one of chilled
air ducts 166, 168 or icebox compartment 160. One or both of
chilled air ducts 166, 168 may be directed around a lateral
perimeter of internal liner 120 within outer liner 118. Supply
outlet 246 and icebox inlet 248 are defined above icebox outlet 258
and return inlet 254.
Turning now to FIG. 17, a flow chart is provided of a method 600
according to example embodiments of the present disclosure.
Generally, the method 600 provides for methods of operating a
refrigeration appliance 100 (FIG. 1) that includes a cabinet 120,
doors 128 and/or 130, and convection compartment 204 (e.g., FIGS. 1
and 6), as described above. The method 600 can be performed, for
instance, by the controller 190 (FIG. 1). For example, controller
190 may, as discussed, be operably coupled to air handler 176,
defrost heater 270, thermostat 272, and user interface panel 148
(e.g., FIGS. 1 and 6). During operations, controller 190 may send
signals to and receive signals from air handler 176, defrost heater
270, thermostat 272, and user interface panel 148. Controller 190
may further be operably coupled to other suitable components of the
appliance 100 to facilitate operation of the appliance 100
generally. FIG. 17 depicts steps performed in a particular order
for purpose of illustration and discussion. Those of ordinary skill
in the art, using the disclosures provided herein, will understand
that the steps of any of the methods disclosed herein can be
modified, adapted, rearranged, omitted, or expanded in various ways
without deviating from the scope of the present disclosure.
Referring to FIG. 17, at 610, the method 600 includes initiating a
defrost cycle. For instance, 610 may be initiated upon
determination that a frost state has been reached. In some such
embodiments, the determination is made in response to receiving a
temperature signal (e.g., from the defrost thermostat) that is
below a set temperature. Optionally, the set temperature may be
determined to have been sustained over a preset amount of time.
Additionally or alternatively, 610 may be initiated at a set time
interval or time of day that has been programmed into controller.
In further additional or alternative embodiments, 610 may be
initiated in response to a user request signal received, for
example, from the user interface panel. In still further additional
or alternative embodiments, 610 may be initiated in response to a
detected number of ice harvest cycles completed at the icemaker. In
yet further additional or alternative embodiments, 610 may be
initiated in response to a detected run time of the compressor.
At 620, the method 600 includes deactivating the air handler in
fluid communication with the convection compartment. For instance,
rotation of the air handler or motivation of air thereby may be
restricted at 620. In other words, if the air handler had
previously been active to motivate air, such actions may be
restricted at 620. Moreover, further activation of the air handler
may be prevented for the duration of method 600. In optional
embodiments, additional air handlers, such as an air handler
motivating a freezer airflow within the freezer chamber, may be
deactivated at 620.
At 630, the method 600 may include activating the defrost heater in
thermal communication with the convection compartment. For
instance, a voltage or current may be directed to the defrost
heater in response to the air handler being deactivated.
Alternatively, the defrost heater may be activated simultaneously
with the deactivation of the air handler at 620.
At 640, the method 600 may include determining a defrosted state.
Specifically, 640 may include receiving a temperature signal, such
as from the defrost thermostat within the convection compartment.
Upon receiving the temperature signal, or in the alternative to
receiving a temperature signal, the method 640 may proceed to
evaluating whether a set temperature (e.g., defrost temperature)
has been reached or exceeded. If the set temperature has not been
reached or exceeded, 640 may proceed to evaluating whether a set
time interval or period has been reached or exceeded. If the set
time interval has not been reached, the method 600 may return to
evaluating whether the set temperature has been reached. If the set
time interval has been reached or exceeded, the method 600 may
proceed to 650. Similarly, if the set temperature has been
evaluated as reaching or exceeding the set temperature, the method
600 may proceed to 650.
At 650, the method 600 may include deactivating the defrost heater.
In other words, the defrost heater may cease generating and/or
directing heat to the convection compartment. Subsequently, further
operations (e.g., of the air handler) may be resumed.
This written description uses examples to disclose the invention,
including the best mode, and also to enable any person skilled in
the art to practice the invention, including making and using any
devices or systems and performing any incorporated methods. The
patentable scope of the invention is defined by the claims, and may
include other examples that occur to those skilled in the art. Such
other examples are intended to be within the scope of the claims if
they include structural elements that do not differ from the
literal language of the claims, or if they include equivalent
structural elements with insubstantial differences from the literal
languages of the claims.
* * * * *